ABB 1SVR730794R3300 Three-phase Monitoring Relay

Product Description

ABB 1SVR730794R3300 (Alternative model CM-PVS.41S) is a three-phase monitoring relay of ABB CM series, compact DIN rail mounted. It is powered directly from the measured three-phase circuit without separate auxiliary supply. It monitors phase loss, incorrect phase sequence, overvoltage and undervoltage simultaneously. It features power-up start delay and adjustable trip delay, with 2 change-over contacts (2c/o). Switch signals will be triggered under fault conditions for contactor control, alarm or equipment shutdown interlock. With 22.5mm slim housing and industrial construction, it complies with IEC and UL standards. Widely used for protection of motors, air compressors, pumps, chillers and other 3-phase loads to avoid equipment damage caused by power anomalies.

Specifications

• Order No.: 1SVR730794R3300
• Model: CM-PVS.41S
• Brand: ABB
• Product Type: Three-phase Voltage Monitoring Relay
• Measuring Voltage: 3×300~500V AC (L-L), 50/60Hz
• Monitoring Functions: Phase loss, phase sequence, overvoltage, undervoltage
• Output Contacts: 2c/o (2 SPDT change-over contacts)
• Contact Rating: 4A / 250V AC
• Start-up Delay: 200 ms
• Trip Delay: 0.1~30s, ON / OFF delay selectable
• Power Supply: Self-powered from measured 3-phase line
• Mounting: DIN TH35 rail mounting
• Housing Width: 22.5 mm
• Terminals: Screw terminals
• Protection Class: IP20 (inside cabinet)
• Operating Temperature: -25℃ ~ +60℃; Storage: -40℃ ~ +85℃
• Weight: Approx. 0.123 kg
• Certifications: CE, UL508, IEC/EN 60255-27, RoHS
• Power Consumption: Approx. 18VA

Applications

1. Industrial 3-phase motors: Protection for fans, pumps, air compressors against phase loss, wrong phase sequence and voltage deviation
2. HVAC systems: Power monitoring and fault interlock for chillers and main air conditioning units
3. Generator & backup power systems: 3-phase output voltage and phase sequence monitoring
4. Automated production lines: Power fault protection for conveyors and hydraulic stations
5. Port lifting equipment: 3-phase power anomaly detection to prevent reverse rotation or phase loss damage
6. Power distribution cabinets: 3-phase busbar voltage monitoring, fault alarm and trip signal output

Series Models

CM-PVS.41, CM-PVS.40, CM-MPS.41, CM-MSS.11, CM-ESS.1